thing is that the addresses are not linearly assigned, but are assigned within a semantic structure2^128 might be enough for all atoms in the universe, but is it enough for all volume of the universe, including the empty spaces between the atoms?We feared exhaustion in ’90-sh less because we were coming up on 43 B devices, but more because the vast amount of that technically available space was unused since it was doled out in lots and included mostly non-existent devices by way of ‘classes’“So just make more space!” Some said Some others said “NAT” the few devices into one address that is actually routable And others said “CIDR” to make the granularity of the spaces more flexible NAT and CIDR were temporary work-arounds, but here we are 30-years later and they’re still holding fast And even desirable in some cases as we became more aware of security issues of having things broadly directly addressable NAT’ing routers became a handy place to consolidate your security efforts in the form of ‘firewalls’
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thing is that the addresses are not linearly assigned, but are assigned within a semantic structure2^128 might be enough for all atoms in the universe, but is it enough for all volume of the universe, including the empty spaces between the atoms?We feared exhaustion in ’90-sh less because we were coming up on 43 B devices, but more because the vast amount of that technically available space was unused since it was doled out in lots and included mostly non-existent devices by way of ‘classes’“So just make more space!” Some said Some others said “NAT” the few devices into one address that is actually routable And others said “CIDR” to make the granularity of the spaces more flexible NAT and CIDR were temporary work-arounds, but here we are 30-years later and they’re still holding fast And even desirable in some cases as we became more aware of security issues of having things broadly directly addressable NAT’ing routers became a handy place to consolidate your security efforts in the form of ‘firewalls’